<template>
    <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车键确认" @keyup.enter="add" v-model="title"/>
    </div>
</template>

<script>
import { nanoid } from "nanoid";

export default {
    name: "MyHeader",
    data() {
        return {
            title: ""
        }
    },
    methods: {
        add(){
            if(this.title.trim() == "") return alert("输入不能为空");
            const todoObj = {id: nanoid(), title: this.title, done: false};
            this.title = "";
            this.$emit("addToDo", todoObj);
            
        }
    }
}
</script>

<style scoped>
    /*header*/
    .todo-header input {
    width: 560px;
    height: 28px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 4px 7px;
    }

    .todo-header input:focus {
    outline: none;
    border-color: rgba(82, 168, 236, 0.8);
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
    }
</style>